There is a balancing act here: while beekeeping does in many ways help support the population of non-native species, you are right in noting that a lot of eurasian plant species that we rely on need domestic bees – and honey bees, in particular – to produce our food. At the same time, that modern monocrop agriculture is further exacerbating the problems faced with non-native species – especially in the case of those eurasian plant species. It seems to me that honey bees must be kept in agricultural settings – and in that case, I hope that they are kept responsibly – but the urban beekeepers discussed upthread should, perhaps, put a larger part of their effort towards keeping native species.

> We're all invasive.

Humans are absolutely not an invasive species in the americas. We may have been when we first arrived – and many native species went extinct as a result – but humans have been a part of the local ecosystems for tens of thousands of years and – where I'm from in canada – have been here since the ice sheets receded and the local ecosystem began to evolve. We are far past the point of being an invasive species and have (had?) long been integrated into the ecosystems in question.